00:01
So this question is asking which study design best fits the statement, which is, which of the following study designs allows us to examine multiple effects of one exposure, multiple effects of one exposure.
00:17
Now, you have taken a guess and saying that it is b cohort study, and i'm inclined to agree.
00:25
It is a cohort study.
00:27
And the reason for this is that by the nature of, what or how these studies are done.
00:34
So first off, i guess let's just say it's not going to be an ecological study.
00:40
Between cross -sectional cohort and case control, a lot of it is actually very similar.
00:49
But one big thing to consider is that a case control study is always retrospective.
01:03
And in fact, the exposure is not what determines the groups.
01:13
It is not the exposure that determines groups, it is the disease.
01:18
Presence or absence of disease determines groups.
01:29
Cross -sectional study.
01:41
So a cross -sectional study is looking at present exposure and disease.
01:58
Okay, so it's concerned with what is happening now in terms of who has the disease and who has been exposed to whatever agent is involved.
02:09
And that leaves us with cohort studies...